Andrew M. Spencer is an Affiliated Lecturer in Medieval History at Cambridge University and Fellow and Senior Tutor of Gonville and Caius College. He is a historian of politics and the constitution of England in the thirteenth and fourteenth centuries and has written extensively on the constitutional, political, military and social role of the nobility in particular. Carl Watkins is Professor in British History at Cambridge University. He is a historian of medieval religious, cultural and political history, concentrating especially on the British Isles in the central and later middle ages, who has also written about death and the supernatural in English culture over a longer chronological span (extending over the middle ages and early modernity). Andrew M. Spencer is an Affiliated Lecturer in Medieval History at Cambridge University and Fellow and Senior Tutor of Gonville and Caius College. He is a historian of politics and the constitution of England in the thirteenth and fourteenth centuries and has written extensively on the constitutional, political, military and social role of the nobility in particular. Carl Watkins is Professor in British History at Cambridge University. He is a historian of medieval religious, cultural and political history, concentrating especially on the British Isles in the central and later middle ages, who has also written about death and the supernatural in English culture over a longer chronological span (extending over the middle ages and early modernity).